STARTING METHOD FOR PRESSURIZED FLUIDIZED BED COMBINED CYCLE POWER GENERATION PLANT

摘要

PROBLEM TO BE SOLVED: To provide a starting method for a pressurized fluidized bed combined cycle power generation plant that can start the pressurized fluidized bed combined cycle power generation plant even when the air supply capacity of an in-house air system decreases.SOLUTION: In a starting method for a pressurized fluidized bed combined cycle power generation plant that performs backflow preventing operation to supply backflow preventing air to a pressurized fluidized bed boiler so as to prevent a combustor combustion gas from flowing back to the pressurized fluidized bed boiler when a gas turbine is actuated, mixed air of air of an in-house air system 101 and air of an air system 111 for control is used as the backflow preventing air. The mixed air is produced by using a backup system 130 connecting the in-house air system 101 and air system 111 for control to each other, in the reverse direction, and sending air from the air system 111 for control to the in-house air system 101.